mmc: sdhci-spear: use generic card detection gpio support
mmc: sdhci-spear: use generic card detection gpio support

sdhci has support for using GPIOs for card detection.  If we have a
GPIO specified, we can use that directly, without needing our own
interrupt handler.

Signed-off-by: Russell King <f6aa0246ff943bfa8602cdf60d40c481b38ed232@arm.linux.org.uk>
Signed-off-by: Chris Ball <711c73f64afdce07b7e38039a96d2224209e9a6c@printf.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs